Selective signal system for railways.



No. 830,247. PATENTBD SEPT. f1, 1906.

P. R. MOBBRTY. SELECTIVB SIGNAL SYSTEM FOR RA-ILWAYS. APPLICATION FILEDJSULY24, 1905..

12 SHEETS-SHEET, 1.

No. 830,247. PATBNTBD SEPT. 4, 1906.

P. R. MCBERTY. SELEGTIVB SIGNAL SYSTEM 'PoR RAILWAYS.

APPLICATION FILED JULY Z4. 1905.

12 SHEETS-SHBT 2.

, f i O 0 LfA No. 830,247. PATENTED SEPTA, 190s.

a P. R. MOBBRTY. SELBSTIVB SIGNAL SYSTEM PoR RAILWAYS.

APPLICATION FILED JULY24, 1905.

12 SHEETS-SHEET 4.

'mimi Eng.

g (fr/7%@ ZY @@1505 I' .M UNED. /f/f/f/f//lllllllllllll "l PATENTBDSEPT. 4, 1906.

P. R. MOBERTY. SELIBCTIVB SIGNAL SYSTEM FOR RAILWAYS.

i 12 sums-sanno: 5;

APPLICATION FILED JULY24, 1905.

, PATENTED SEPT. 4 1906. R. MOBERTY. i' SELE'CTIVBSIGNAL SYSTEM POB.VRAILWAYS.

APPLICATION FILED JULY24, 1905.

12 SHEETS-SHEET e.

PATBNTED SEPT. 4, 1906.

F. R- MOBBRTY. SELEGTIV SIGNAL SYSTEM FOR RAIL WAYS.

APPLIUATION FILED JULY 24, 1905.,

70?: rig,

PATENTED SEPT. 4i 1906.

F. R. MOBERTY. Y SELEGTIVE sGN'AL SYSTEM POR RMLWAYS.

'APPLIGTION FILED JULY 24, 1905.

12 SHEETS-SHEET 8.

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, 650 ffey@ PATENTBD SEPT. 4, 1906.

F. R. MOBBRTY. SELEGTIVE SIGNAL SYSTEM POR. RAILWAYS.

Arruonlon Hmm www., v190s.

'12 sums-snm o.

www.

l No. 830,247.

PATBNTED SEPT. 4, 190s. y

- F. nl Hassan;

.SELBGTIVB SIGNAL SYSTEM PoR RAILWAYS.

APPLICATION FILED JULY 24, 1905.

' 12 SHEETS-SHEET 10.

' Nfasmml PATENTBD SEPT. 4, 1906 F. R. MUBERTXl SELBCTIVB sGNAL SYSTEMPoR RAILW APPLICATION FILED JULY 24, 1905.

Jaarsf AYS.

12 SHEETS-SHEET 11.

IE w! @756 j! 'H-wl PATENTED SEPT. 4, 1906.

. P. R. MOBERTY. SELBG'TIYE SGNAL SYSTEM POR RILWAYS.-

APPLIGATION FILED JULY-24, 1905.

12 SHEETS-SHEET 12.

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jzderzZLoV-x UNITED STATES PATENT oFFroE. i

FRANK RL MCBERTY, OF EVAN'STON, ILLINOIS, ASSIGNOR TO WESTER ELECTRICCOMPANY, OF CHICAGO, ILLINOIS, A'CORPORATION OF ILLINOIS.

SELEQTIVE sleNAi. SYSTEM Fon RAlLwAvs.

U `Specification of Letters Patent.

Patented sept. 4, 190e.

Application iiled July 24, 1905. Serial No. 271,068-

vpoints along the track.

Heretofore in systems of this kind the operation of setting a signal hasrequired a multiplicity of movements by the centr-alstation operator,the a paratus has been crude andnot fully deve oped, and the testsignalwith the `lighting of the semaphorehas been solely under the control ofthe set semaphore and once having been given could not be repeated. Therestoring of'the semaphore to its normal position has been by manualmeans requiring some one at the substation. These systems have thereforebeen clumsyand subject tor errors,'making them unreliable.

The object of my invention is to provide an im roved system andapparatus which shall e reliable, re uiring a. minimum of movements toeffect t e desired operation of the signal, these movements beinginterlocking to prohibit errors; to construct apparatus which ispositive in its action, not easily gotten out of order, and is simpleand compact.

A further object of my invention is to provide a test-circuit under thecontrol of the semaphore, whereby the operator after having-set a semahore can test atV any time and be informed o the position of thesemaphorearm and the condition of the signal-lamp in the semaphore-box.

The circuit of my'improved system comprises two lines with groundreturns connectin -a central station with a plurality of signa ing orsubstations for se ecting, setting,

. and restoring the signals j and a circuit branched to ground from arelativelyhi h- -voltage connection for testing. In ot er words, thethree principal'elements of the lcircuit are the'two lines and atest-circuit.

view in detail of the selecting-wheel.

It will be understood thatthe operator is provided with means by whichhe may select` any one of several stations alongthe route olv the trainswhich are under his direction, and havin made the selection is able todisclose or wit draw the signalin this instancea' semaphore andsignal-light-at will.-

The apparatus at the station of the operator-that is, at the centraloffice-I have termed 'the selective apparatus or selec- I `he apparatusat a substation or point at which slgnals are to be given consists of asignal-setting mechanism and a selecting v mechanism coperatin'gtherewith. yThis a paratus is so arranged that'the operator, W o willknow the location of thediiierent trains, may give such signals as maybe required from time to time'alnd get in communication.

by telephone or otherwise with the conductors to give more specificorders as occasion arlses.

My invention will be more :readily understood by reference to theaccompanyingdrawings, in which- Figure l is'a sectional side elevationof the central-station selector. Fig. l'a is a detail view of the cammechanism for releasing the plunger, as seen from line a; Fig. 1. Fig. 2is a front elevation of the central-stationselector. Fig. 3 is a view indetail of the switch-springs and operating-ratchet of the selector. Fig.4 is a view on a reduced scale in elevation of a substation apparatus.

Fig. l

5 is a sectional side elevation of the same on a larger scale, showingthe signal-setting'l mechanismy with the case containing the seeeflecting device below. Fig. 6 is afront ele-l vation of the semaphoremechanism partially in section, showing the signal-setting" mechanism.Fig. 7 is an isometric view in detail of the selecting device,`*thecasing ,being broken away and the cover -thereof removed. Fig. 8 isafront elevation of the Fig. 9 is an end elevation ofthe sesame. lectingdevice, the case and some of the parts being shown in section. Fig. 10is aside Fig. 12 is a diagram illustrative ofv Fig.

IOS n the circuit completed tov operate the selectnormal position.

ing or determining wheel. Fig. 13 is a dia-- gram showing the conditionsof the circuit when the selecting-wheel has closed its contact and thesemaphore is displayed. Fig. 14 is a diagram of the testlcircuit. 15shows the circuit which is made to restore the selectingdevice'automatically, and Fig. 16-is a diagram illustrative of thecircuit formed when the semaphore is released..

., between switch-springs eez.

Like parts are indicated by similar letters throughout the differentlviews. Y Referring to Figs. 1, 1a, 2, 3, and 11, A of insulatingmaterial, such as slate, forms the mounting. Framework Bl is. mounted onthe rear of the plate A and supports a yoke C, which has a tubularextension D, through which a rod E is adapted'to slide and insert itsWedge-plunger F, of insulating material, The rod E is normally forcedout by the spring S, inclos'ed in the extension I).

A cam-plate G is mounted'to slide verti- Y cally in the yoke-'piece C.It is provided at the rod slides. On the rod E is mountedaconical-shaped iece c, carrying a in p.' Normally a toot s ofthecam-plate is in line Withl the pin and prevents the rodfrom its 'centerWith an opening h, through which being pushed in. When,'however, the rodis rotated, the tooth is no longer in the pathof the pin, and the rod Emay b e depressed,

A shaft H, rotatably mounted in the plate A', carries atits'rear endartooth'ed Wheel I, one tooth t of lwhich is longer than the others.

fA pair' -franged of switch-contact springs 1' are arto ride over theteeth of the wheel I.

v'FSA radial arm 7c, fast to the hub of the wheel f- I, carries asupport for the camroller n. To

control the movementl of thel shaft H is a train of gears K, with aretarding-vane d and weighted friction-clutch c, arranged so as topermit rotation of the train ofgears in a righthand direction only.

At the frontend of cured to it is an arm R, adapted to travel over theface of an annular plate U on the front of theI plate A. In the`right-hand por-` tion of the plate Ul therel isl a series ofholes i. o,with which a pin i, carried'by a -spring- 'actuated lever lv, isarranged to engage as the arm R swings around the circle. The holes oare lnumbered as shown in Fig. 2,.to

correspond to the several signals on the line.

' vIn this case there are iive signals.

The handle q on'the arm R carries afbutton-plunger terior of thesemaphore-box B2.

framework F in the case B', roo

the shaft H and sie` g, bearing against one end of the lever lv, for

withdrawing the stop-pin from a noie and the under side of 'the arm R soas to over a series of plunger-buttonsb when the arm 1s rotated andforce them down mamenso release the arm. A vlug m is sect-.red to ftarily tobreak the contacts of switch-springs y l. A terminal t forms acircuit connection for the plunger-button b itself. The arm R alsocarries a pivoted lever L, one end of which bears against the rod E andthe opposite end of which bears against ya small plunger-button b2,engaging a spring s1". Thev rounded 'end ofthe spring lmoves inproximity to a ring U', concentric with the ring and formed of vametallic piece i2 and an insulating-piece d2. f-f

' A series of relays T, each with an actuating and a locking winding,are mounted, as shown, on the rear of the plate A". The relays areconnected in circuit with a series of signallamps L set into the face ofplate A and -numbered t correspond to the signals at the substations.

Referring now to Fig. 4 et seg. the selecting device and mechanism foroperating the semaphore V2 at the substation are located in an ironsemaphore-box B2, which is usually mounted on a pole in aconspicuousplace, so that the motorman maysee the signal. 4 Y

The selecting device is inclosed in a sepa-y rate case B, removablymounted in the in- A shaft S3, supported by a carries a toothed wheel W,the teeth of which' are engaged by two pawls N and N2. Pawl N is pivotedto the free end of the armature A2 of a magnet M. The armature isfastened to one arm of a bell-crank lever', the 105 other arm Aa ofwhich extends between switch-contact springs s2 s3 and is adapted, whenthe magnet is energized, to open con'- tact of s2 and close contact ofs3. The circuit connections of these springs will be exrio plainedhereinafter; The pawl N normally has its prong h2 withdrawn fromthe pathlof the teeth of the wheel W, this being causedy bythe curved end of thepawl resting upon a screw s4; supported by a lug attached to the frameF. AThe pawl N2 is controlled by an armature A4 ofa magnet M2, mountedon the side of the case. The pawl N2 is fas-- tened to one arm of abell-crank lever the other arm A'of which is arranged when the 12omagnet is `energized to close contact springfSs' normally forces thepawl N2 into engagement with the Wheel, W, holding it against a backwardrotation which is caused by the coil-spring S".

C is an escapement mechanism to control the movement of the wheel W. v

`The front end of shaft S3 carries a1 diskv p2, mounted on oppositefaces of the disk. T he location of the pms on the disk is relativelydifferent for each station and comprises the selective adjustment of theapparatus. A pin p3, projecting from the periphery of the disk D', restsagainst a stop-bar b3, mounted on the frame, and preventsthe disk andshaft from rotating backward past their normal position. rl`wo sets ofswitch-springs yn.2 n3 are mounted onthe framework F' and project intothe path of the pins p and p2, respectively. Vhen the disk is rotated,the Y pins are adapted to move the springs to close theircontacts.Binding-posts t2 t3, &c., are provided on the exterior of case B' forconnection with the" apparatus contained therein.v A hinged cover forthe case forms a means of ready access to the contained mechanism.` Itwill thus be seen that the selecting device forms a unit mechanism whichcan readily be removed from the semaphore-box and be replaced by a newone in case of its derangement.

In the upper part of the semaphore-box B2 is mounted the signal-settingmechanism. A cylindrical compartment M4'is mounted on top of the box andcontains a solenoid O'. The plunger P5 of the solenoid is connected bylinks to crank C2, which is rigidly fastened to shaft H2, pivoted inbearings r -r2 on the side of the box B2. The crank C2 has a projectionj, which normally rests against a stop O4 and holds the semaphore in apositionwhich I shall designate the clear"`po sition. A lip f on the endof the crank C2 is adapted, when the crank is; drawn up, to lock with asecond lip f 2, carried by one arm of a weighted bell-crank lever L3,which normally holds it out of the path of the lip j", but which isadapted to be moved into its path, as shown in dotted lines in Fig. 6,by an electromagnet E4, mounted on the boXB2. The crank C2 also carriestwo contact-blocks k2 k3, arranged to make connection withspring-terminals m' and m2, respectively. The contacts 7f3 and m2 areclosed when the -crankis in its normal position and contacts 7a2 and lmare closed whenthe crank is drawn up. These contacts, as shown in Fig.11,v

the current through the lamp M5 for he signal. Normally the lamp is andis included in a branch from the otential circuit to ground throughcontacts" k3 m2; but when the signal operates the lamp is lightedthrough the high-potential vcircuit grounded instead through contacts k2m', through which circuit also the testcurrent is taken. y

The shaft H2 projects through the semaphore-box and carries at its endan arm A14, provided with a semaphore-vane V2 and the usual coloredwindows through which the bulls-eye lens Y', lighted by the lamp M5,throws a strong light to indicate at night the position of the vane.

Referring to Fig. 11 et seg. the operation of my system and apparatuswill be described as follows: Suppose it is desired to set a semaphoreat some point along the track, let us say at signal No. 5. Thecentral-station operator will depress the thumb-button g, which liftspin t' fromthe hole in'which it is resting and moves the arm R of theselector in a right-hand direction around its face until it is over holeNo. 5 of the circular plate U. He will then allow the pin to drop intothel hole which locks the arm at that position. In swinging the armaround the toothed wheel I ma ies and breaks the circuit at thecontactsprings 1', so that a series of impulses of current are sent overthe line from battery B5, through switch-springs r, over line A a',magnet M', line a2, magnet E4 to ground, this portion of the circuitbeing shown diagrammatically in Fig. 12. This energizes the magnets M'and E4 of all the substations, causing'them` to attract their armatures.Armature A2 of magnetM' moves the pawl N'and allows its curved end toride down off screw s4. The prong h2 of the paw] engages the teeth ofthe ratchet Wheel W', and steps the ratchetwheels at all the substationsaround a number of times equal to the number of impulses sent over theline. In this movement the pin p' on the disk D' of station No. 5 Willbe carried far enough around to close the contact of the switch-spring71,2, but the pins at all the other stations will not close theircontact, as they occupy di'erent angular positions on the disk D'. Thearmature of magnet E4 remains attracted as long as the arm R remainslocked at position No. 5, because the teeth of the ratchet-wheel I andthe a'rm R are so relatively arranged that whenever the arm is held inposition over any one 'of the holes 0 by the pin 'L one of the teeth ofthe ratchet-wheel will be in position to press the contact-springs 1together to maintain the circuit closed. The lip f2, carried by thearmature of magnet E4, 1s thereby projected in the path of the lip f onthe crank C2. The operator now depresses the handleL `on the arm R,forcing the but-ton b2 down, causing the spring S10 to make contact withsegment 'i2 of the inn-er ring U' ont-he face of plate A. This completescircuit, as shown in Fig. 13, from battery B5 through 57, segment t2,spring s1", arm R, line B b3 c3, contact n2 b, solenoidmagnet O' and 12to ground. The solenoidmagnet O' becomes energized and draws up its coreI5 and by means ofthe link Z2 and crank C2, which are connected to thecore, the arm A, which carries .the vane V2, is drawn up and locked bythe engagement of the lip f' with the lip f 2. The vane V2 is nowdisplayed to indicate dangen the solenoid-core B5 also causes crank C2to break contacts fm2 and 7f3, which when closed complete a,circuit froma high-voltage trolleyline through t1", lamp M5, resistance R', con- Thedrawing up ofA TOO IIO

. the semaphore, as

tacts m2 k2, resistance R3 to ground, and to close contactsm and k2,which transfer the normal ground through resistance R3 to an auxiliaryground through resistance R2 and to again step forward theratchet-Wheels W of the selecting devices until thepin p2 at signal No.5 closes the contact n3; At the same time the button b corresponding tosignal No. 5 will be depressed by the lug m on the arm R as it passesthe button on its way to zero position. A circuit from the high-voltagetrolley-line will thus be closed through t1 R t, contacts ml k2, contacts2, contact n3 c3 bs, back over the line B to the arm R of the selector,rbutton b', spring t', magnet winding w ofthe relayT to ground. Adiagram of this circuit is shown in Fig. 14. The resistance R hassufiiciently reduced the current tapped off from the high-voltage lineto permit its use in the local circuit of the selector. The energizationof the winding w of the magnet T will cause it to draw u its armature t,closing the local circuit o the lamp L, this 'circuit being easilytraced from the positive pole of battery B, through locking-winding nu,contact l (which will be closed, the arm R having by this time passedover the button b,) lamp L', armature contact I', and the magnet-frameback to battery. The locking Winding @U2 will thus maintain the localcircuit closed and the lamp L in a lighted condition until the contact Zis broken again, as will be described hereinafter. It will thus be seenthat it is im ossible to get connection to the outside hig -vol tageline unless the'semaphore has been set, and having been set theabove-described testcircuit is established and the lighting of lamp Lindicates that the signal has been set, that the lamp M5 is lighted, andthat the high-potential trolley-current is on the line. lf any one ofthe above conditions were notfulfilled the lamp L would fail to lightwhen the arm assed over the button bwhich wouldv indicate that therewaseither no current on the trolley-wire or that the lamp M5 was out, orthat the semaphore had .failed to operate. As the arm R approaches thezero osition the contact-sprin s 1' are held closedp by the long tooth ton t e ratchet-Wheelfl, maintaining the circuit ,shown in Fig. 12closed,

' whichincludes themagnets M and E?, thus on segment '1.2,

closing the contact` s3,.- spring S10 makes contact witha raised spot swhich then vthrows current in the portion of circuit shown in Fig. --towit, ,from battery B5 b2 s14 s, arm R,line B b2, contact s3 b1, magnetM2 b to ground-thusV holding back the paWlN2 and closing contact At thesame time s3 to maintain curren'tin magnet M2 when magnet M releases itsarmature and opens contact s3.' As the arm.R continues' its revolutionthe-contact at 1j is opened a ain, thereby denergizing magnet M anreleasin N rides up on screw s2 Iand withdraws h2 om the ratchet-wheelW, which, under the inluenceof spring s", returns to its zero ositionwith pin 'p3- resting on stop b3 as bot awls N and N2 are withdrawn. Thearm -has nowreturned to and stopped at its zero position. -V

Let us assume that the operator has gone through the vabove moves andhas correctly set the semaphore at signal-station No. 5

and that he has received" the test-circuit indi` cating that the dangerposition is shown and that the lamp is lighted at that signal. Hedesires to release-the semaphore. He again rotates the armrighti'fianded to hole No. 5, sending impulses over the line and closing.the contact n2 at signal No. 5 by the pin p', the circuit being as.heretofore described. He now raises the lever L, which depresses theplunger F, the cam vGr operating, as previously described, to hold Fdepressed, and forces out the switch-springs e2 e3 to 'close theircontacts. This applies current over the circuit shown in Fig. 16, frombattery B5, through b2, one branch going through contacts e2, over lineA a', magnet M c2, a2, magnet E2 to ground, the other branch goingthrough contacts e2 over line B 68, contact n2 62 solenoid O to ground.The energization of the solenoid causes it to draw up its plungersufliciently to raise the lip f out of enga ement with lip f 2 so thatwhen magnet E4 is energized the lip f 2 will be withdrawn by the springs15 out of the pathof lip f semaphore-arm .will be free to drop to theclear position when the vsolenoid O is denergized. The arm R iscontinued in its rotation and brought'around to the zero position, butthe selecting'devices at the signal-boxes do not move, however, as thesprings 1l are short-circuited at e3, and the contact n2 at the signalNo. 5 thus remains closed. As the arm approaches zero the lug mdepresses thel button b and breaks the lam -circuit at l', releasing thearmature t6v of t e. magnet T, and as the test-circuitis open at contact'n3 the armature remains unattracted and the lamp is extinguished. Asthearm R applunger E is proaches its zerofposition the unlocked bycam-plate G and y means of spring S is returned to its normal position,breaking contacts e2 and e3, thereby opening -thefcircuits of solenoid Oand magnet E, The solenoid O releases the semaphore, which has beenunlocked as heretofore explained. At the same time the sprin so engagesthe raised portion s# and comp etes and the springs s s2 together toshort-circuit contact i Vits armature lA2, and the curved end of aw 'lIOO IIS

turned by their spring to normal position.A

It will thus be seen 'that I first use line A, over which and through aground return impulses of current-fare sent from thefcentral station tooperatethe step-by-ste selective devices in the fsubstation semapore-boxes to set only the mechanism of the signal-station whosesemaphore it is 'desired to o Verate, this current being left on theline to energize a locking-magnet which is arranged to lock thesemaphore after it has been set in the` danger position. I thenmomentarily send current over line B and a ground return to energize asolenoid and set the semahore to indicate danger where it is thus ockedby the locking-magnet. The setting of the signal at this position shiftsthe normal ground of a branch circuit containing a lamp (the-branchbeing connected from the external circuit of relatively high voltage) toan auxiliary ground from which, after the `shifting of groundconnections occurs, is

tapped off and sent over line B sufficient current to operate at thecentral station a relay designed to close and lock a local circuitcontaining a lamp. Thus a test-circuit is formed which notifies theloperator of the operation of the semaphore and the condition of itslamp. I then make use of both lines A and B, which are used together tooperate simultaneously the magnets controlling the stepby-stepmechanisms and to finally restore these mechanisms -to their normalpositions at all the signaling-stations. The final operation again usesboth lines A and B together, over which currents are sent to operate thesemaphore-solenoid and the lockingmagnet to unlock and release thesemaphore, which drops to the clear position when both the solenoid andmagnet are denergized, said solenoid restoring the normal ground to itslamp-circuit, which keeps thelamp lighted, but breaks the test-circuitand permits the breaking of the vlocal circuit to extinguish thetest-lamp. Thus one set of magnets is operated by current sent .over oneline and another set is operated by current sent over a second lineseparate from the first line and 'entirely unaffected by current changesin the first line, and both lines operated vs1- 'multaneously arenecessary for operating both sets of magnets to restore the apparat'usto its norma condition. Itwill also be noted that the test-current isderived from an external source, Which, before it can be used, requires'the operation of the semaphore. l

One of the novel features of my selector consists of the singleunidirectional rotating arm, which in onerevolution performsv fouroperations. First, it causes theinterrupter to send the impulses overthe line to operate the substation selecting devices to select thedesired station; second, it places an auxiliary switch carriedby the armin osition to ape ply current to set the semap ore at the seectedstation; third, it automatically receives test-current from thesubstation selected and applies it to a local circuit for operating avisual signal, and, fourth, it automatically restores the substationselecting devices to their zero or normal position. A subsequentrevolution of the arm is made to set again the substation selectingdevices so that a second auxiliary switch, also on the revolving arm,can be operated to apply current over the two lines to release thesemahore and to remove the test-signal and eave the'system in its normalcondition.

The selecting devices at the substations, it will be noted, are adaptedto coperate with the central-station selector for stepping forwardsynchronously at all the Vstations a ratchet-wheel operated by anelectromagnet to close a local contact at the selected station only,making it possible to send a current` to the signal-setting mechanismofthe selected station, a further stepping forward of the Wheels closingthe second local contact at the selected station so as to send thetest-current back to the central station. The unlocking-I magnetoperating simultaneously with the actuating-magnet allows the spring torestore to normal the ratchet-wheel, and a second step-by-step movementplaces the circuits in position to release the signal, after which theselecting device itself returns 'to zero position.

In the third mechanism of my improved system', Which is thesignal-settinor mechanism, consisting of the solenoid and lockingmagnetadapted to receive current througi the cooperation of the selector andsubstation selecting device to draw up the senaphore and through alocking-detent to retain it in its set position, I have arranged aswitch on the signal-arm to transfer a normal ground to an auxiliaryground forgivin the test-current through the semaphoreamp from theexternal high-voltage source. i

It will be observed that the U-shaped arm A, which supports thesemaphore-arm, is combined with the hood A15 over the pivotal support ofthe arm, the said hood A15 having inclined troughs on its face extendingbeyond the range of movement of the arm A to prevent the formation oficicles within y such range.

yHaving thus described my invention, I

claim as new and desire to secure by Letters Patentl. In a selectiveVsignaling system, the com'- l bination with the main selector-arm at the-central office, of a test-circuit containinor two points of control,one point of control being adapted to be closedl in the setting of thesemaphore, and the otherpoint of control by themovementof theselector-arinafter the 's'emaphore has been set,-said circuit beingnnected with a sourcel of current, a lampsigi'ialfl'g, a relay 'l1 withits windings and convtact'adapted toclose and'lock thev relay and bringvthe lamp into circuit to illuminate the same on. the, further movementofthe arm, substantially as-described. i

a selective signalin system, the combination with the main se ector-armat the `central ofiice, of a test-circuit adapted for connection to oneof a plurality of substations, said test-circuit having'two'points ofcontrol, one point of control located at the substations and governed bythe movement of the semaphores, the' other point of control beingoperated by themovement of the selector-arm, said test-circuit beingconnected y ofcurrent with'a test-circuit under the cuit beingassociated wit ings adapted to close and jbringthe lamp-signal intocircuit -the same, substantially f4. In a selective signaling system,the combination ofthev main selector atthe central "office,

witha sourceof current lin the operationof the semaphore atvtlie'connected substation and a lo al circuit at the central olceadapted to op rate a signal through the energization of-thetest-circuit,substantially as described.

3. Iiia ,selective signaling system, a source controlof one of aplurality of semaphores and the main selector-arm, the movement of thetrolling-points and a subsequent movement semaphore acting to close oneoftwo conof the selector-arm operating to close the other Aof saidcontrollingoints, said test-cirla lamp-signal L', a

y T with its windlock the relay and to display as described.

source of current and a rel of a test-circuit associated with a localanda substation-semaphore,

Selector-circuit said testcircuit being under the joint control of themovements of the main selector and the'substation-semaphore, said move-`I'nelits,being in sequence ,the said semaphore' tially as descri beingadapted lector, whereby the to .move in advance of the setest-circuit isclosed to energize the local selector-circuit. and displaya-'test-signalat thel central ofiice, substanbed. 5'.l The combinationAwith the selector-cir- ,cuit, of-an mterrupter-wheel I provided with Aclosed, an electromagnet 'abroad tooth t, acontact-spring radapted toVride on said broad tooth to hold said "circuit,

M at a substagf' tion maintained energized while the said Q 'evice,aratchet-wheel,

said-'ratchetr is-thusholding revent the return movement of a selectingan/electroinagnet-M2 having itspawl N2. adapted to engage with heel whensaid electromagnet circuit including the said.

is denergiz'ed, la

controlledby a contact s3 s rin the ,circuit closed, there, ymaintaii'n'ng a pawl N in position to held closed while the spring i* isriding over tooth 't, a second contact or point of control s14 and ashort-circuiting device s6 controlled by magnet M2 tomaintain a circuitaround contact s3 when magnet M is deenergized after the broad tooth thas assed from' un'- der spring 1, whereby the se ecting device is rwith'its line being conrent from said source to both of said lines at lthesame time but adapted to remove current from one of said lines todenergize the electromagnet connected therewith,before the removal oicurrent from the other -v line', whereby said selecting device isreleasedrom the control of the electromagnets and returns to Zero,,substantially as described.

`7. In a selector-circuit, two lines A and B -connecting a centraloffice with a plurality 0i' substations, a source of current and ,meansfor applying current Jfrom said source to both of the linessimultaneously, and adapted for the unsimultaneous withdrawal of saidcurrent from said lines, incombination with elec-I tromagnetscontrolling a selecting device at the substations,- said magnets beingconnected in the respective two lines and associated IOO together bycircuit connections, -to maintain Y current through some of the magnetsafter the others have been denergized through the uns'imultaneouswithdrawal of the current from the two lines, whereby the' selectingdevices are released and allowedto return to their zero positions. 1

8. In a selector-restoring circuit, a source of'cui'rent ata centraloiice, two lines and means for applying said source to said lines,

said means adapted to apply current over one civ the lines for apredetermined interval oi time and to simultaneously apply current overthe other line for. a longer interval of time, said iirst line beingassociated with sub- A station apparatus to effect v the current tothesecond line after the circuit of the irst line is broken, saidassociated apparatus controlling a selecting device-adapted to bereleased'yby'the removal 'of the current from the line at'the end oftheshorter interval ottime whereby the selectingdevice isreleased. v y

9 The releasing-circuit including the points of control yeZV etat the;central office, and'al the application of y contacts c2 e3 to withdrawcurrent from said circuit, substantially as described.

i 10. VIn a signaling system, a semaphorereleasing or restoring circuithaving controllingpoints at both the central office and substation,means for closing the substation point of control and then vsubsequentlyclosing the points of control at the central oiiice, a source of currentfor said circuit, sent over the circuit upon the simultaneous closure ofall the controlling-points to energize the substation signal device andmeans for automaticallyT opening the c mitral-station,controlling-pointsto open the circuit, substantially as described.

.11. In a releasing-circuit for a selective signaling system, two pointsof control, one at the substation and one at the central ofiice, theoperation of the substation controllingpoint being governed by aselecting device whose circuit is ineffective for selecting upon theclosure or' the central-ofiice controllingpoint, a signal device at thesubstation in said releasing-circuit and a lock for said signal device,said device being energized upon the simultaneous closure of the twocontrollingpoints and means at the central office for opening the.controlling-points thereat and releasing the lock land signal,substantially as described.

12. In a releasing-circuit, two lines A and B with a common source ofcurrent, two points e2 e* at the central oiiice controlling theapplication of current from said source to the two lines, a point ofcontrol n2 at the substation cooperating with point e2 at the centraloffice to cause current to traverse line B to operate thesubstation-semaphore electromagnetic device, means for closing the pointof control n2, means controlled by the application of current over theother line A through the point of control e3 to maintain close'd thepoint of control n2 at the substation, means at the central office foropening the contacts c2 e3 to withdraw current from saidreleasingcircuit to release said semaphore, substantially as described.

13. In a selective signaling system, two separate lines connecting acentral station with a plurality of signaling-stations, and a third linecarrying high-potential current and including the signaling-stations, asource of current at the central' sta-tion, and means for applying thecurrent therefrom ove the two separate vlines to operate the signals atthe signaling-stations, and means at the signalingstations madeoperative on the movement of the signal to apply current from the thirdline over one of the two separate lines to operate a test-signal at thecentral station.

14. In a selective signaling system for electric railways, a centralstation and a plurality' of signaling-stations, circuit connectionsbetween the same, a test signal or lamp at the central station for eachof the signaling-stations, a semaphore, means at each signalingstationfor putting the semaphore into operative condition, coperative means atthe central station for selecting a signaling-station to operate itssignal, a return-current device actuated through the operated signaltodisplay the indicator atV the central station corresponding to thesignaling-station whose signal has been set.

15. In a signaling system, a selector, a. sclecting device and asignal-setting mechanism, two lines `connecting theselector with theselecting device and the signal-setting mechanism, in combination with abranch containing a lamp from a line of relatively high potential,connected permanently through the signal-setting mechanism and adaptedto be connected through the selecting device at the selector.

16. In a selector for a signaling system, a single unidirectionalrotating arm mounted on a shaft carrying a current-interrupter and aretarding mechanism combined with means for the selective positioning ofthe arm, means carried by the arm for applying eurrent to a line, andmeans controlled by thc arm for applying current from the line to alocal circuit.

17. A selector comprising a unidirectional armrotating over a dialarranged for selecting a. substation, said arm carrying a lever adaptedto be depressed to seitla signal at the substation'and to be raised torelease said sct signal, a source of current adapted to be connectedwith said arm in combination with a TOO lug carried by the arm adaptedto control the application of current from said source to a localcircuit for displaying a local signal on the face of the selector, saidcurrent being under the control of the signal at the substation.

18. In a selector for a selective signaling system, a singleunidirectional rotating arm, a circuit-interrupting device operated bysaid arm and adapted -to send impulses of currentover the line, a switchon the arm arranged for applying at selected points over two linesconstant current, and a signaling device in a local circuit controlledby said arm.

19. In a selector of a signaling system, a single unidirectionalrotating arm mounted on a shaft carrying a current-interrupter and aretarding mechanism, said arm carryinga lever controlling l-twoswitches, one switch actuated by a depression of the lever to applycurrent over a line 'to set a signal, and the second switch actuated' by'a litt-ing of the lever to apply current over two lines to release saidset signal, means for connecting a ITO two sets of switch-springscontrolled by said '1o wheel 'and adapted to-.be closed in sequencethrouglgrfa forward movement, a pawl norllly'. vrestraining); thebackward. movement lot-said wheel and an electromagnet actuating saidlpawl to release said wheeLand meas t 'e wheel when 'released,combinedfsubstanl lfor' 'causing theebackwardmovement of' `tiallyyasdescribed.

- 21,.-ln a selective movement, whereby one electromagnet op eratedaloneproduces a forward movement of the wheel to close theswitch-springsand Y- both magnets operated together roduce a ,backward movement ofsaid whee setting. mechanism comprising an electro magnet connectedoperated through controlled by an switch.

a plunger therefor shaft carrying a semaphore-arm,

electromagnet E4,

circuits through the semaphore-arm and cir cuit connections l device fora selective .signaling system,` 'two .electromagnets conzo `trolling themovement ofv a step-by-step switching-wheel, two setsof switch-springscontrolled by said wheel and adapted to be l closed' 5in sequence,. incombination with .s means for giving the wheel a backward 22. `Thecombination in a selective signalingsystem for electric railways, of asignal to a' signal with a switch the movement of said signal andadapted to transfer a `test-circuit connection, a locking device forsaid signal electromagnet and a lamp for said signal under the controlof the 23. The combination in a signal-setting l mechanism of asolenoid-electromagnet, with connected to a rotating a locking devicefor said shaft normally inoperative but put into operative positionthrough an a switch controlled by 'said shaft, said switch adapted tocomplete from the signal-setting 5C mechanism to a cooperating selectingdevice.

' 24. The con/ibination with a signaling system for selectively settingJfrom. a central station a signal at one of a plurality of suh-'stations, of a selector at the central station, a selecting device anda signal-setting mechanism at each of the substations, said selectorconsisting of a unidirectional rotating arm for sending im ulses ofcurrent over a line to operate the se ecting devices to select a sub-`.rent from a battery over'a line to operate the signal-settingmechanism, a switch operated by the signal-setting mechanism to applythrough the coperation of the selecting device current rom an externalsource to the selector-arm for use in a local circuit of the selectorwhen the arm reaches a position synchronously with, and corresponding tothat of the selecting device, a signal in the local circuit and alocking-relay controlling the display oi' said signal, a switch operatedby the lever and mounted on the rotating arm for applying current overthe two lines to release the signal, and'means Jfor restoring 'theselecting devices to their normal positions.

25. The combination with the arm A14 supporting the semaphore, of thehood A15 extending over the pivotal support of said arm, the said hoodhaving inclined troughs on the face thereof extending beyond the rangeof movement 'of said arm, substantially as and for vthe purposespecified.

26. A signal-station signaling systems having signal-operating mechanismmounted within an inclosing case, a second inclosing case containing aselective device mounted withiisaid firstmentioned inclosing case butindependent of the signal-operating mechanism, whereby the secondinclosing case with ,its selective device may be removed as a unit fromsaid first-mentioned case without disturbing the signal-operatingmechanism.

In witness whereof I hereunto subscribe my name this 7th dav of July, A.D. 1905.

FRANK R. MCBERTY.

Witnesses:

F. P. McINfrosH, E. F. BEAUBIEN.

station, a lever on the arm for applying cur-l for use with railway

